Thanks to @CoreyPDX, some help identifying a bug with true/false customizer parameters.
While fixing this bug, I also added support for checkboxes to the customizer. Anytime a parameter is listed as a value=true, or value=false it will not be converted into a check box.
In addition, I added code to protect the platform by limiting uploaded images to 1MB, filenames to 40 characters and blocking the upload of files with __ (doubles bars) in the name as I use this formatting for internal processing.
Next, I will be adding download statistics available to creators for their models, and we have started work on restructuring the customizer backend to increase performance, support creator-identified library modules, and dynamically include any font found in Google library of fonts. Unfortunately, the customizer backend changes require significant new code; therefore, they are probably a month away.
Thanks to everyone for reporting any bugs you find or feature you would like to see.